Describe the bug you're experiencing

Seeing the following error during world loading- single player.

Relevant Error: https://gist.github.com/Sandriell/c0e5fd18b83815bd6866690eea01e06f

Full Log: https://gist.github.com/Sandriell/f6a1cc50ce6d6a2f5a797ee8ad9c8008

Mod: fastasyncworldsave-1.20.1-1.9

Reproducability

Load single player world.

Mod up to date

• Before submitting this issue I updated to the newest version and reproduced it

Minecraft version

1.20.1

Modloader version

Forge

Logs

https://gist.github.com/Sandriell/c0e5fd18b83815bd6866690eea01e06f

fixed in 2.0, compiling randomly forgot to include the refmap